Improvement in tool-holders for grinding



C. N. FISHER..-

TOOL HOLDERS FOR Gunfire Patented May 2,1876.

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- v ATTORNEYS I N- PET HS. PHOTO-LITHOQRAPNER. wlsmnmou- D4 on nL s N.FISHER, 0F WILLIS, TEXAS, ssIenoR OF ONE-HALF -HIS 'RIGHTTO JOSEPHFBAMPTON, OF SAME PLACE.

YlM-PRbVEM'E'NT m TOOL-HOLDERS 'FOR- GRINDING.

Specification forming'part of Letters Patent No. 176,946, dated May 21876 application filed January 9, 1875.

' T0 all whom it may concern Be it known that 1, CHARLES" N. FISHER, ofWillis, in the county of Montgomery and State of Texas, have invented anew and valuable Improvement in Tool-Holders, andI do hereby declarethat the following is a full,

clear, and exact description of the construction and operation of thesan1e,refer'enee being had to the annexed drawings, makinga part of thisSpecification, and to the letters and figures of reference markedthereon.

Figure 1 of the drawing is a representation of a'longitudinal verticalsection of my tool- "holder; .-Fig. 2 is a plan view of'the same, and

Fig. 3 is a sectional detail view.

a This invention has relation to improvements in holders, which aredesigned for holding tools in contact withthe periphery of a grind- Istone; and the nature of theinvention consists in a triangular frametransversely braced at or near the middle-of its length, which I braceis provided witha perforation adapted to receive the end of a metallichook, upon the screwthreaded end of which is applied a clamping-nut,whereby a means is provided for holding axes,1chisels, and the like whenthe same are rigidly clamped by the said hook against thebrace bysetting up the thumbnut. Italso consists inadetachable plate appliedupon the crossbar, and clamped against the same by means ofthumb-screws,

whereby a means is provided whereby a flat tool-as, for instance, aplane-bit.may be rigidly set against the edge of the stone to prodnceanydesired bevel, when the same is inserted between the crossand-clamping-plate and the set'screws set up, as will be hereinaftermore fully explained.

In the annexed draWings,-A designates a.

triangular .wooden frame, consisting of two lateral bars, a, and ahandle-bar, b, as shown at suitable distance to'one side of the centerof its length, a perforatioininto whieha' hook,

h, is designed to be inserted under circumstances and for a" purposehereinafter ex pose of allowinga flat tool, such as a plane 1 bit, to beheld in an inclined position upon the edge of the stone, as shown inFig. 1., i This tool or any similar flat tool is held rigidly inplace'by setting up screws d, thereby clamping it rigidly up againstplate 0 by their action upon clamp-plate D. The tapering point- (2, ofcorner piece 13, is' adapted to be inserted into an upright, shown inFig. l, rigidly secured in proper position relative to the grindstoneupon itsframe, the frame A of the holder extending over and beyond thestone. By this means a vertically vibratory motion may be imparted tothe tool for the purpose of giving it the rounding edge common to manyvarieties of tools.

With a view to adapting .the holder above described tobe used forholding tools with enlarged handles, as chisels, and other likearticles, I make use of a strong metallic hook, It, having itsscrew-threaded end i passedinto the registering perforations abovementioned in' the clampplate D and cross-plate (),v as shown in Fig. 3.designates a thumb nut applied upon the projecting screw-threaded end *6of hook 71., whereby it is rendered capable of being clamped over thehandle of a chisel for the purpose of holding it rigidly againstvibration. The handle of a chisel or other like tool is inserted underthe hooked end of clamp it between it and plate 0; thumbnut j is thenforcibly set up, and the tool secured in position for grinding. Point 0of corner-piece B being inserted into a suitable perforation in theupright above described, and the stone having been set in motion, the

operator is enabled to rapidly and conveniently manipulate the tool togive it either astraight or a round edge. e

What I claim as new, and desire to secure v by Letters Patent, is-- Thetool-holder herein described, consisting of the triangular frame A,provided with the angle-iron B, having the tapering'point'c, theclamp-plates D and G, the plane of the latter being inclined to theplane of the frame, and

the former being provided with the nook'h having a screw-shank, z, andthumb-nut j, substantially as and for the purpose set forth,

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

CHARLES NICHOLAS FISHER. Witnesses:

- J. M. FULLINWIDER, A. E. FULLINWIDER.

